Answer:
Explanation:
7x + 5y = -13 ....multiply by 2
-2x - 7y = 26 .....multiply by 7
-------------------------
14x + 10y = -26 (result of multiplying by 2)
-14x - 49y = 182 (result of multiplying by 7)
-----------------------add
-39y = 156
y = -156/39
y = -4
7x + 5y = -13
7x + 5(-4) = -13
7x - 20 = -13
7x = -13 + 20
7x = 7
x = 7/7
x = 1
check...
-2x = 7y + 26
-2(1) = 7(-4) + 26
-2 = -28 + 26
-2 = -2 (correct)...it checks out
answer is : x = 1 and y = -4 or (1,-4)